Slide 1 : Basic Construction Created by Girish Rao
Slide 2 : To Draw a Perpendicular to the given Segment Steps
Draw seg AB of given length
Keep the steel point at Point A and with suitable radius draw an arc which is more than half of the length of seg AB
Keep the steel point at B and cut the previous arc
Join both the arc to draw a line perpendicular to seg AB A B
Slide 3 : To draw an angle bisector Steps
Draw an angle of given measure
Keep steel point on the vertex and mark an arc of suitable measure
Keep the steel point on the marked arc on the arms of angle and draw two arc
Join the vertex of the angle to the arc to get the bisector
Slide 4 : To draw an angle congruent to given angle Steps :
Draw an angle of given measure
Draw a line
Mark an arc on this angle with suitable radius.
With the same radius mark an arc on the line
Keep steel point on one arm of the angle and pencil point on other arm of the angle.
With this radius cut the previously drawn arc
Draw a ray through the intersection of arc to make an angle
Slide 5 : To draw an perpendicular to given line from a point outside it Steps :
Draw an segment of given measure.
Mark on point outside this line
Keeping steel point on the given point and with suitable radius mark an arc on the given line segment.
Mark the arc to get the perpendicular
Draw a line passing through the given point and the marked arc
Slide 6 : To draw perpendicular to a line from a point on it Steps
Draw seg of given length.
Mark point on the given line
Keep metallic point of compass on the point and mark an semicircle of any measure.
Place a metallic point the marked arc, with suitable radius draw an arc on the upper side.
Place metallic point on the other end and cut previous arc
Join the arc to the point .
Slide 7 : A B A1 A2 A3 A4 A5 B5 B4 B3 B2 B1 Draw seg AB of 7 cm and divide it in five equal parts 7 cm Steps
Draw seg AB of 7 cm.
Draw an angle of 600 at point A and then at point B.
With any convenient radius mark five arcs ray AM.
Without changing the measure mark five arc on ray BN.
Join points A5 B, A4B1 and so on M N
Slide 8 : To construct a line parallel to given line A B O P Q M Steps:
Draw a seg AB of given length.
Mark point O anywhere on this line
Construct an angle of 600 at this point.
On the ray OM, mark point .
Construct an angle of 60 at this point to get a line Parallel to AB
Slide 9 :